Transmission mechanism.



No. 859,975. YPATENTED JULY 16, 1907. F. J. POND. TRANSMISSION MECHANISM,

APPLIOATIDN FILED T11R23. 1907.

15 in s'aeskemu FRANK J. POND, OF OOEELATA, INDIAN TERRITORY.)

'rnau'siurssiois Mummers.

Epeeifieationof Letters Patent.

fetented July 16, 1907.

Application filed February 23,1907. Serial No. 358,843.

To all whom 'it may concern:

Be it known that I, FRANK .1. Pour), a citizen of the United States, residing at ()chelata in District No. 3, Indian Territory, have invented certain new and useful improvements in iraiumission Mechanism, ol which the following is a specification.

My invention relates to improvements in'transrnission inechanisni,'anrl my object is to provide such mechanism whereby the driven object or machinery may travel at different speeds While the motor furnishing the power travels at a uniform rate of speed.

While the invention is applii s l a vazlev o machinery, itis particularly a ted for use in all) nection with well-boring or drilling machinery where it is desirable to permit the drill to move downw rd with increased speed, through force of gravity, so that its blows may prove effective upon the material being penetrated. V c

eferring new to the accompanying {lliL\-. l Figure 1 represents my invention applied to a drilling machine. Fig. 2 is an enlarged vertical section of the invention on line Il-li of Fig. 8. Fig 3 is a vertical section on line III-Ill ofl ig'. 2, V

1 designates a tower of the drilling machine in position for boring a well.

2 designates a walking'heam for raising the dril (not shown) after eachdownwurd stroke of the latter.

3 designates a standard upon which the walkingbeam is fulcrumed;

4 designates a crank shalt journaled in standards 5.

6 designates a connecting rod pivoted at its ends to the crank shait and one end of the walking-beam.

7 designates a drive'puilcy loosely mounted upon the crank shaft and driven by. a suitable motor (not shown) through the medium of a belt 8.

9 designates a pair of driveniembers having cupshaped centers ly loosely mounted upon the crank shaft and peripheral flanges 12 secured to the opposite sides of pulley 7 by bolts 10. Between the cups and the flanges the members are upset to produce annular recesses 13 concentric with and located next within the flanges, and in the outer edges of these recesses are formed'rings or internal ratchet Wheels 11. The recesses receive a pair of driven members consisting of disks 14 having axially elongated hubs 1 extending out into the cups 9 and keyed or otherwise fixed to the shaft 4. These disks have a plurality of peripheral recesses l5 for the reception of a plurality of pawls 16, pivotally mounted therein and adapted to engage the internal teeth of the drive members 9.

In, practice pulley 7 drives the crank shaftthrough the medium of the intervening members, a part of each revolution, and causes said shaft, through rod 6 and walking-beam 2, to lift the drill until the crank member on shaft 4 passes slightly to the rear of a perpendicular line drawn through thecenterof said shaft. The

weightof the drill, through the force of gravity, 'will "then cause it to rapidly descend and the crank shaft to complete the remainder of the revolution at a higher rate of speed than that traveled, by pulley 7, with the result that pawls 16 will slide idly over the ratchet- By permitting the crank shaft to turn more rapidly shall the pulley during the descent of the drill, it is obvious that the speed of said pulley will be substantially uniform, and it may be driven by a gas engine,

which so far as I can learn, has heretofore been impracticable for this class of work, owing to the variable speed of the crank shaft, which is necessary to obtain an effective blow with the drill. I

Having thus described my invehtiom what I claim 1. In a transmission mechanism, the combination with tho shaft, :1 drive pulley loosely mounted on the Sliuft a pair of drive members having peripheral flanges bolted to opposite sides of said pulley and offset to form recesses next insidev the flanges, the oITset porflons'bclng provided 'willi internal ratchet, tcetlnund hubs for said members;

or 11 pair of driven disks llttlng wlthin said recesses and secured to said shaft, and pnwls carried by the driven 'uiemlmrs and adapted to engage the ratchet teetl\,'for the purpose set forth. I

2. In a tmnsmlsslon mechanism, the 'comhlnatlon'wlth the shaft, a drive pulley loosely mounted on the shaft, a 9

pair of drive members having peripheral flanges bolted 10' opposlle sides of said pulley and olfset to form recesses next inside the flanges, the offset portions being provided will] internal rnlclu-t teeth, mule-up shupcdccutors for said nmnhci"v of a pair of driven dlsks fitting loosely within said rwossos and having uidully elongated llllllS fitting within said cups and secured to said shaft, and puwls carried by the driven mcmho and udnptcdlo engagethe ratchet [cell]. for lllc purpose not forth.

In testimony whereof I ufilx my signature, 1n the prescucc of two wilncs I i FRANK .T. POND.

Witnesses:

Fun!) I. Silmun, GRACE G. Snnnwoon. 

